CVE-2026-53804Public exploitNetwork attack vector

Admin-level command execution via PGP shell injection

Published Aug 20, 2026 · Updated Aug 20, 2026

OS command injection in OTRS Community Edition 6.0.41 and earlier allows remote authenticated users to execute commands via crafted PGP configuration. In Kernel/System/Crypt/PGP.pm, _Init() reads PGP::Bin and PGP::Options from system configuration, concatenates them into a single shell command string, and executes that string with Perl backticks while checking the GnuPG version. Exploitation requires an administrator who can deploy configuration changes and then trigger PGP initialization during ticket activity; injected commands run as the web server process user, not as root unless the service itself is elevated.

CVSS severity8.6
High
EPSS probability1.25%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

OS command injection in OTRS Community Edition 6.0.41 and earlier allows remote authenticated users to execute commands via crafted PGP configuration. In Kernel/System/Crypt/PGP.pm, _Init() reads PGP::Bin and PGP::Options from system configuration, concatenates them into a single shell command string, and executes that string with Perl backticks while checking the GnuPG version. Exploitation requires an administrator who can deploy configuration changes and then trigger PGP initialization during ticket activity; injected commands run as the web server process user, not as root unless the service itself is elevated.

The record

CVE
CVE-2026-53804
Published
Aug 20, 2026
Updated
Aug 20, 2026
Vendor
Centuran Consulting
Product
OTRS Community Edition
Classifications
CWE-78, T1059.004
Attack vector
network
Privileges
admin

Timeline

How it unfolded

  1. Aug 20, 2026CVE publishedPublication date reported by the CVE source.
  2. Aug 20, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=0 <=6.0.41
  2. Affected versionversion=0 <=6357cdb89fe1dcc83a84fba14bd0f22898eea99a

What conditions does exploitation require?

Attack vectornetwork
Required privilegesadmin

What is affected?

Centuran Consulting · OTRS Community Editionversion=0 <=6.0.41; version=0 <=6357cdb89fe1dcc83a84fba14bd0f22898eea99a

Published CVSS scores

7.2VulnCheckCVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H
8.6VulnCheckCVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesadmin
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-78Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection')
T1059.004Unix Shell

Public exploit references

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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